Unit 1
Unit 2
Unit 3
Unit 4
random
100
Atom that gains -1 charge
All in group 17
100
What type of bond forms between sodium and chlorine?
ionic bond
100
Name the compound Na₂O.
sodium oxide
100
Identify the type of reaction and balance:
H3PO4 + Ca → Ca3(PO4)2 + H2
Single replacement
2H3PO4 + 3Ca → Ca3(PO4)2 + 3H2
100
pH scale measures what ions?
hydroxide (H+)
hydroxide (OH-)
sharing electrons
200
Element - _______________
Symbol - Y
Atomic # - _______________
Atomic Mass - 89
Protons - ______________
Neutrons - ______________
Electrons - ______________
Charge - -3
Element - Yttrium
Symbol - Y
Atomic # - 39
Atomic Mass - 89
Protons - 39
Neutrons - 50
Electrons - 42
Charge - -3
200
These are involve in chemical bonding?
Valence electrons
200
What is the formula of aluminum chloride?
AlCl3
200
Identify and balance the equation: KClO3 → KCl + O2
Decomposition
2KClO3 → 2KCl + 3O2
200
Which can be broken down to simpler substances?
Atom
Compound
Elements
Compounds
300
Which illustrate pure compound?
a.
b.
c.
d.
a
300
Which type of bond shares electrons?
Covalent bond
300
Write the formula for magnesium hydroxide.
Mg(OH)2
300
Rank alpha, beta, and gamma decay from the strongest to the weakest penetrating powers.
Gamma-Beta-Alpha
300
which substance releases hydroxide ion (OH-) and has a pH level higher than 7?
base
400
Symbol - 7029Cu-2
Atomic # - _______________
Atomic Mass - ____________
Protons - 29
Neutrons - 41
Electrons - ______________
Symbol - 7029Cu-2
Atomic # - 29
Atomic Mass - 70
Protons - 29
Neutrons - 41
Electrons - 30
400
If an atom has 9 protons and 10 electrons, then the atoms is
neutral
positively charged
negatively charged
negatively charged
400
Write the name for formula NaNO3
sodium nitrate
400
If a radioactive isotope has a half-life of 10 years, how much of a 100 g sample remains after 30 years?
12.5 g
400
which element could X represent? 
O, S, Se, Te, Po
500
How many neutrons are in the nucleus?
10
500
how do atoms in covalent compounds behave
Share electrons
500
What is the chemical formula of strontium phosphate?
Sr3(PO4)2
500
A sample of a radioactive element decays to 25% of its original mass in 20 years. What is the half-life of the element?
10 years
500
What bond will Zinc and Copper form?
Metallic
Ionic
Covalent
Metallic